Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > General / Other

Reply
 
Thread Tools Display Modes
  #1  
Old 10-19-2015, 12:32 AM
WASkier WASkier is offline
TT Newbie
 
Join Date: Oct 2015
Boat: 93 Prostar LT1
Location: Northwest
Posts: 2
Stargazer set-up on LT1 too hot - any ideas

I recently purchased a 93 Prostar 190 with an LT1 engine. The boat only had 285 hours but did not have speed control. I put in a Stargazer system but am having trouble getting it to properly control the speed.

The calibration passes are close to perfect - but when pulling a skier I get variation.

If the system engages behind the island it comes into the course hot - as much as 2 mph fast. We have been getting around this by disengaging the system once the skier is up and then re-engaging as we come out of the island. This works ok - but we shouldn't have to do it. There is a 2004 Prostar with Stargazer that works just fine when it engages behind the island.

The other challenge is the variation in speed in the course. Some balls as .04 fast and then the boat slows down so the total time is very good within .01 or .02.

I'm running inverted RPM mode and have a good linkage test. I'm also in contact with PerfectPass but thought I would see if anyone else had this challenge and how they resolved it.

Thanks!
Reply With Quote
  #2  
Old 10-19-2015, 11:41 AM
mgs96ps's Avatar
mgs96ps mgs96ps is offline
MC Fanatic
 
Join Date: Mar 2013
Boat: 96 ProStar 190 LT1
Location: Midwest
Posts: 802
.....

Last edited by mgs96ps; 05-11-2016 at 10:56 PM.
Reply With Quote
  #3  
Old 10-19-2015, 01:41 PM
TallSkinnyGuy TallSkinnyGuy is offline
TT Enthusiast
 
Join Date: Aug 2013
Boat: 1997 Prostar 190
Location: Nor Cal
Posts: 337
I had the same problem at first. I was using the standard RPM mode initially and when I put it into RPM mode it jumped around quite a bit. I then switched the RPM link to "inverted" and the RPM mode held steady perfectly. I then tried using the GPS Slalom mode again and it worked well without the surging I'd experienced before.

You said you are already running in "inverted" mode -- have you tested this by running in RPM mode and making sure it holds steady? For example, if you set it to 3200 RPMs in RPM mode it should hold steady at 3200 with only periodic jumps up to 3210. If it jumps around more than 10 RPMs do this same test with the standard RPM setting. If neither the standard RPM nor the inverted RPM settings are holding RPMs steady for you, then there is some problem that hopefully PP people can help you with. Good luck.
Reply With Quote
  #4  
Old 10-19-2015, 03:29 PM
east tx skier's Avatar
east tx skier east tx skier is offline
MC Hero
 
Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 26,109
Was going to suggest taking a look at the return spring. What version of the software are you running? Older versions would go a little nuts in turns and try to speed up to compensate for the gps signal indicating a much slower speed (as opposed to the previously measured straightline speed). This was fixed, but seems to have returned in the most recent update for some unknown reason.

As for ball to ball speed, have you gone into the software and fine tuned for the gate, 1, and 3 ball?
__________________
Previous: 1993 Prostar 205

Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.

FAQ


Be kind. Have fun.
Reply With Quote
  #5  
Old 10-19-2015, 04:36 PM
WASkier WASkier is offline
TT Newbie
 
Join Date: Oct 2015
Boat: 93 Prostar LT1
Location: Northwest
Posts: 2
Thanks for the suggestions! Here are the responses:
1) Return Spring - when I hooked up the supplied retrun spring, it was pulling the throttle back so it was definately too strong and I loosen it. Actually since it settles to speed ok without a skier PP suggested I did not need it.

2) RPM test - yes the RPM holds to the set point with no more than 10 RPM variation.

3) Software - I am running 8.0.06. Your comment about older SW is very interesting. We have another MC running 7.0.62 and it does not have this issue. PP is going to send me this version to try as a next step.

4) So far PP has not suggested any fine tunning, do you have any reccomendations to try?

I really appreciate all the input!
Reply With Quote
  #6  
Old 10-19-2015, 10:47 PM
east tx skier's Avatar
east tx skier east tx skier is offline
MC Hero
 
Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 26,109
Quote:
Originally Posted by WASkier View Post
Thanks for the suggestions! Here are the responses:
1) Return Spring - when I hooked up the supplied retrun spring, it was pulling the throttle back so it was definately too strong and I loosen it. Actually since it settles to speed ok without a skier PP suggested I did not need it.

2) RPM test - yes the RPM holds to the set point with no more than 10 RPM variation.

3) Software - I am running 8.0.06. Your comment about older SW is very interesting. We have another MC running 7.0.62 and it does not have this issue. PP is going to send me this version to try as a next step.

4) So far PP has not suggested any fine tunning, do you have any reccomendations to try?

I really appreciate all the input!
I like everything about 8.0.06 or whatever the latest is except that it now gets confused in the turns again. I have owned every version of the SG software and they had that knocked out since the very first update. We don't do too much spinning at the end of the course. So it's not a huge deal for me with how quickly SG engages and holds speed for us otherwise.

I have some fine tune numbers that worked well for TSC Nautiques. Not sure it would transfer over well to a different hull/engine/transmission combo. Frankly, with the latest update, I haven't even updated the fine tuning. Times with skier so far have been good out of the box for us.
__________________
Previous: 1993 Prostar 205

Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.

FAQ


Be kind. Have fun.
Reply With Quote
  #7  
Old 10-20-2015, 01:39 AM
TallSkinnyGuy TallSkinnyGuy is offline
TT Enthusiast
 
Join Date: Aug 2013
Boat: 1997 Prostar 190
Location: Nor Cal
Posts: 337
Quote:
Originally Posted by east tx skier View Post
I like everything about 8.0.06 or whatever the latest is except that it now gets confused in the turns again. I have owned every version of the SG software and they had that knocked out since the very first update. We don't do too much spinning at the end of the course. So it's not a huge deal for me with how quickly SG engages and holds speed for us otherwise.
I find this interesting and disturbing. I bought my SG this past spring and therefore have the latest version (8.0.06) and have been very disappointed in the turns issue. I had read that this was a problem in older versions but had been taken care of. Mine doesn't handle turns well at all and I just figured it must have been REALLY bad in the past, but turns out that my version has the same problem as the old versions!

I called PP about it earlier this year and they said I just have to throttle back in turns to disengage and then throttle back up when going straight again. I grumbled but accepted this, but the issue has continued to bug me.

Sorry for the threadjack.
Reply With Quote
  #8  
Old 10-20-2015, 02:31 AM
epnault's Avatar
epnault epnault is offline
MC Devotee
 
Join Date: May 2010
Boat: 2016 ProStar 6.2L
Location: Maple Grove, MN
Posts: 1,372
Quote:
Originally Posted by TallSkinnyGuy View Post
I find this interesting and disturbing. I bought my SG this past spring and therefore have the latest version (8.0.06) and have been very disappointed in the turns issue. I had read that this was a problem in older versions but had been taken care of. Mine doesn't handle turns well at all and I just figured it must have been REALLY bad in the past, but turns out that my version has the same problem as the old versions!

I called PP about it earlier this year and they said I just have to throttle back in turns to disengage and then throttle back up when going straight again. I grumbled but accepted this, but the issue has continued to bug me.

Sorry for the threadjack.
As much of a pain that this is, my last 2 boats had this setup and we had to throttle back in the turns. I think it is the nature of the PP system.
Reply With Quote
  #9  
Old 10-20-2015, 07:23 AM
ProStar Slalom's Avatar
ProStar Slalom ProStar Slalom is offline
TT Enthusiast
 
Join Date: Dec 2006
Boat: 1984 S&S, 2001 19 Skier
Location: Southeast
Posts: 383
I spent the better part of last season messing with mine. The challenge is finding the right mix of driver input and system set-up to enter the course at exactly the right speed; if it's off when you enter it will chase the right speed (fast and slow) throughout the course to exit at the right time...makes for an interesting ride.

For me with a relatively short set-up on one end and wife for driver (so can't blame her) it frustrated the hell out of me. I've used classic mode this year and run 16.95 on just about every pass with a nice, steady pull...GPS still provides times and holds a good speed for tricks. Not ideal or what I hoped to get out of it, but it works for us.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 11:20 PM.